通过μ-拉曼光谱研究多孔硅纳米结构中的液体调制光热现象。

Liquid-Modulated Photothermal Phenomena in Porous Silicon Nanostructures Studied by μ-Raman Spectroscopy.

作者信息

Makukha Oksana, Lysenko Ivan, Belarouci Ali

机构信息

Lyon Institute of Nanotechnology, UMR 5270, INSA de Lyon, 69100 Villeurbanne, France.

Physics Department, Taras Shevchenko National University of Kyiv, 01033 Kyiv, Ukraine.

出版信息

Nanomaterials (Basel). 2023 Jan 11;13(2):310. doi: 10.3390/nano13020310.

DOI:10.3390/nano13020310

PMID:36678063

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9867246/

Abstract

In the present study, the effect of liquid filling of the nanopore network on thermal transport in porous Si layers was investigated by μ-Raman spectroscopy. The values of thermal conductivity of porous Si and porous Si-hexadecane composites were estimated by fitting the experimentally measured photoinduced temperature rise with finite element method simulations. As a result, filling the pores with hexadecane led to (i) an increase in the thermal conductivity of the porous Si-hexadecane composite in a wide range of porosity levels (40-80%) and (ii) a suppression of the characteristic laser-induced phase transition of Si from cubic to hexagonal form.

摘要

在本研究中，通过μ拉曼光谱研究了纳米孔网络的液体填充对多孔硅层热传输的影响。通过将实验测量的光致温升与有限元方法模拟进行拟合，估算了多孔硅和多孔硅 - 十六烷复合材料的热导率值。结果表明，用十六烷填充孔隙导致：（i）在广泛的孔隙率水平（40 - 80%）范围内，多孔硅 - 十六烷复合材料的热导率增加；（ii）抑制了硅从立方相到六方相的特征激光诱导相变。